21131336

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{613}}^1$

素因数の和:789

約数の個数: 32

約数和(自身を含む): 41260800

約数和(自身を除く): 20129464

約数列:

[1, 2, 4, 8, 31, 62, 124, 139, 248, 278, 556, 613, 1112, 1226, 2452, 4309, 4904, 8618, 17236, 19003, 34472, 38006, 76012, 85207, 152024, 170414, 340828, 681656, 2641417, 5282834, 10565668, 21131336]

約数ペア:

[(1, 21131336), (2, 10565668), (4, 5282834), (8, 2641417), (31, 681656), (62, 340828), (124, 170414), (139, 152024), (248, 85207), (278, 76012), (556, 38006), (613, 34472), (1112, 19003), (1226, 17236), (2452, 8618), (4309, 4904)]